ANSWER:
Ask him to provide an authentic hadith where it is mentioned that you need to do Istinja after passing wind to renew the wudu!
He will not be able to produce this as what he says is not authentic.
Performing istinja from passing wind is an innovation and it is done only by Shia to my knowledge of yemen, known as azzaidiya.
https://islamqa.info/en/answers/2137/istinjaa-for-breaking-wind